Code Definition

B100A — Connector Semi-Overlay

System: Body  |  Type: Manufacturer-Specific  |  Make: Holden

About B100A

B100A is a manufacturer-specific body diagnostic trouble code recorded for Holden vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B100A is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The SRS/Airbag Control Module monitors the integrity of critical airbag and pretensioner connectors fitted with CPA (Connector Position Assurance) or shorting bar mechanisms. DTC B100A is set when the module detects that a monitored connector is not fully locked, partially engaged, or in a semi-overlay condition, meaning the terminals may be touching but the connector lock is not fully engaged. This condition compromises circuit reliability and SRS deployment confidence, causing the module to disable the system and illuminate the airbag warning lamp.

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